org.otalo.ao.client.Broadcasts.java Source code

Introduction

Here is the source code for org.otalo.ao.client.Broadcasts.java

Source

/*
 * Copyright (c) 2009 Regents of the University of California, Stanford University, and others
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.otalo.ao.client;

import java.util.ArrayList;
import java.util.List;

import org.otalo.ao.client.JSONRequest.AoAPI;
import org.otalo.ao.client.model.JSOModel;
import org.otalo.ao.client.model.Survey;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * A panel of broadcasts, each presented as a tree.
 */
public class Broadcasts extends Composite implements JSONRequester, ClickHandler {
    private ArrayList<SurveyWidget> widgets = new ArrayList<SurveyWidget>();

    /**
    * Specifies the images that will be bundled for this Composite and specify
    * that tree's images should also be included in the same bundle.
    */
    public interface Images extends ClientBundle, Tree.Resources {
        ImageResource inbox();

        ImageResource sent();

        ImageResource responses();

        ImageResource reject_sm();

        ImageResource drafts();
    }

    private Images images;
    private VerticalPanel p;

    private int startIndex = 0;
    /*
      * This variable should be consistent with otalo/views.py
      */
    private static final int BCAST_PAGE_SIZE = 10;

    /**
     * Constructs a new list of forum widgets with a bundle of images.
     * 
     * @param images a bundle that provides the images for this widget
     */
    public Broadcasts(Images images) {
        this.images = images;
        p = new VerticalPanel();
        Anchor more = new Anchor("More");
        more.addClickHandler(new ClickHandler() {

            public void onClick(ClickEvent event) {
                startIndex += BCAST_PAGE_SIZE;
                Messages.get().loadBroadcasts(startIndex);
            }
        });

        Anchor newbcast = new Anchor("New Broadcast");
        newbcast.addClickHandler(new ClickHandler() {

            public void onClick(ClickEvent event) {
                Messages.get().forwardThread(null);
            }

        });
        //p.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
        HorizontalPanel bcastOpts = new HorizontalPanel();
        bcastOpts.setWidth("100%");
        bcastOpts.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
        bcastOpts.add(more);
        bcastOpts.add(newbcast);
        p.add(bcastOpts);

        initWidget(p);
        load(startIndex);
    }

    public void load(int start) {
        startIndex = start;
        if (start == 0) {
            Widget opts = p.getWidget(p.getWidgetCount() - 1);
            p.clear();
            p.add(opts);
        }

        // Get surveys
        JSONRequest request = new JSONRequest();
        String params = "?start=" + String.valueOf(start);
        request.doFetchURL(AoAPI.SURVEY + params, this);
    }

    public void dataReceived(List<JSOModel> models) {
        Survey s;
        SurveyWidget w;

        for (JSOModel model : models) {
            s = new Survey(model);
            w = new SurveyWidget(s, images, this);

            p.insert(w.getWidget(), p.getWidgetCount() - 1);
            widgets.add(w);
        }

    }

    public void selectFirst() {
        for (SurveyWidget w : widgets) {
            w.close();
        }
        if (widgets.size() > 0)
            widgets.get(0).selectFirst();
    }

    /**
     * This is for clicked tree items. Unselect all other ones
     * and collapse their trees
     * @param event
     */
    public void onClick(ClickEvent event) {
        Object source = event.getSource();
        for (SurveyWidget w : widgets) {
            if (!w.contains(source))
                w.close();
        }

    }

}